Piston ring



' Mounted in each groove 6 is a piston ring 7 Patented July 418, 1933 UNITED STATES PATENT om@ nor w. rA'roN, or IIAGERSTOWN, INDIANA, AssIGNon fro THE runs-Dcr CIRCLE con- I'ANY, or IIAGEns'I'owN, INDIANA, A CORPORATION o1:-k INDIAN'A PIs'roN RINGl applicati@ mea mi 1, Issa. `serial No. seam.

My inventionrelates to piston rings for internal combustion engines andthe l1ke.

I The principal object of my invention is to provide a novel compression piston ring of the scraper type ywhich 'accomplishes much better lubrication and greatly reduces oil consumption and blow-by/of the gases past ther iston rings. fully appear from the following description, reference `being had to the accompanying drawing in which; Fig. 1 is a detail vertical .section taken through part of a piston and rings embodying my invention;

FigLQ is an enlarged cross-section through one of the rings, the angularity of the ring. with respect to thepiston groove and cylinder wall being illustrated in somewhat exaggerated fashion; and A Fig. 3 is an edge elevationjof the rmg. t The pistony 4, which operates in the cylinder 5 vof the internal combustion engine, may

be of'any desiredform and, as usual, is provided with the usual piston ring grooves 6.

embodying my invention, rthough the top ring, if desired, may be of the conventional form which does not have an oil collecting groove. l

My ring is provided witha recess or chanel 8 in its outer lower corner andthe channel isy of uniform height and depth throughout. The channel terminates adjacent the ends of the ring, the ring being full-faced at the usual joint or gap 9 formed in the ring. In Fig. 1, the upper ring is shown in crosssection at 90 to the joint 9 and the lower ringhas one end shown in elevation. In forming the ring, the lower corner (that is, the outer corner toward the crank case of the engine), except for the dams 10, is cut away by any suitable tool to form the channel 8. Preferably, the ring is rectangular in' cross` section and the depth of thermg is substan-` e objects of ymy invention will vmore edl row being preferablyless in width than'the height of the cylinder contacting face'of the I have found that, because ,of the removal o f the metal, to form thechannel 8,- cross-sectional strains cause the ring', when under compression, to distort` or twist with the `result ythat its outerv cylindrical facebecomes taf ered or inclined with respect tol thev cyliner ,wall as illustrated somewhatexaggeratin Figl 2 y a vseries of comparative actual tests,

, using my rings and several prior art rings, I

find that my `improved ring affords better lubrication'between the ring and the piston andthe ring and the cylinder wall, that the leakage of oil past the ring is greatly reduced and 4'that excessive blow-byofthe gases is eliminated. The width of the outer face of the ring is reduced by reason of the channel `8, thus "increasing the unit-pressure ofvthat face against the cylinder wall. kThe unbalancing of lthe section of the ring causesthe lower edge Yof thev face of the ring to exert the greatest ressure against the cylinder wall,n which en ancesthe oil'scraping action, ofthe rin and affords better sealing ofthering agalnst the cylinder wall. The channel 8 being of uniform height and'depth eiects more uniform pressure and `sealing at the lower edge of the outer face of the ring throughout its circumference; Asthe channel 8 terminates adjacent the joint of the ring the oil is better trap d in the channel as it cannot es cape intot e joint and, at the same time, the blow-by is greatly reduced as the gases cannot pass through the joint into the channel 8. Thus, it will be appreciated that a small annular oilreservoir is formed by this channel `8, the cylinder wall and the lower side of the ring groove in the piston. The oil trapped in the reservoir thus causes a substantially uniform seal vof the ring at its loweredge with the ring groove and the cylinder wall.A y I claim:

1. A compression ring for internal com bustion engines having a piston provided v with a groove,'consisting o a ring s lit at one point to form a joint and adapte to be I mounted .in the groove of the piston, the ring having in its outer lower corner a chan- 1atter.;. y t 2; A comp'ression'rin'g `for1nternal com-k l5v nel and dam portions which terminate the channel adjacent the ends of the ring, the

channel-.being of such uniform height and f depth thtfthe oil is substantially equally distributed about the'channel to eiect a substantially uniformi seal with'said ring groove and cylinder wall 'throughout the entire 1 length of thechan'nel, the cylinder contact-'S ing'face of :the ring being reducedbylthe channelto theextent of,v the height 'of the bustion engines havingV a piston yprovided with aigroove,' consisting of aring substan- :tially vrectangular in cross-section :andvsplit `at one point.'to;form'a 1joint `andgadapted to' be mounted in the grooveof -the"piston, the ring having ay shallow, rectangular channel formed'fin'fitsy outer lower cornerysaid chany v nel being of 1 suohsubstantia1lyuniform depth 'and heightv around the ring, except. where it terminates adjacentsthe joint, thaty the oi'l `is substantially equally distributed abouti-fthe channel` toeiect a substantially uniform :seal withvsaid ring groove-and cylinder wall ythroughout ytheventireV length of. the channel, the ring being `full-faced at the l A `.3. Ay compression ring.y for internal combustion engineshaving a piston Vrovided withl agroove, comprising a ring sp it at one point to'orm 'aivjoint and adaptedy to be mounted-inthe groove ofthe piston, the ring having in its outer lower corner a channel closed by dams adjient said joint, ythe chan-n eight anddepth whereby with a ,groove,-comprisinga ring-split at one "combination ,of 1 .a piston provide vgroove, comprising a kring split at-one point v to forlrrajoint andmounted in the-groove having-in its outer lower corner a channel terminated by dams adjacent said joint, the

channel being of such minor height and depth relative `to the height and thickness of the ring that the oilis caused t0 be substantially equally distributed.l about :the channel to effect a substantially uniform seal with the ring groove and cylinder wall y throughout the channel.V

5'.` A compression rlng for: internal combustion engines having a piston provided -with a groove', comprising a vring split at one point to -form a jointand ladapted to be mounted the lgroove of the piston,l the ringhavingin its outer lower corner al channel terminated by dams adjacent said-joint, .said channel being of lsuch'jshape and size as. to cause the ring to twist throughout thev circumference of the ring,and"continuouslyL 'and firmly press the lower edge of the 'contacting facey of the ringy against the' cylin-V der wall upon contraction "thereof incident to insertion in the cylinder vand to cause the oil v in. the reservoir. formed the channel,v the cylinder walLandjfthe lower side of the ring groove in the piston'to substantially uniformly seal the ring at' its lowerfedge said ringgroove and atthecylinder 16. yIn an internalcjombustionrfen ne, the with a of ythe piston, 'the fringhaving in v.its outer lower corner a rectangular. channel and dams at, the'y joint [terminating the 1V channel;` the dams being narrower circumferentially than the height 2 of thecylinderfcontacting face,

andthe channel being ofsuch uniformhei'ght.- i' i andde'pth and not'imore than one-third the V"height and depth of'v the ring lwhereby an oil reservoir formedby the channelythe cylinderwall and lowerjside of the ring groove to seal the ring at its lower edge with the ring groovek and at the :cylinder wall.

n' ROY W. 'PATON 

